python 7.13.1. Warm Up: Peoples weights

I get the following error:

Traceback (most recent call last):

File "main.py", line 45, in

index = int(input("Enter a list index location (1 - 4): ",sep= " "))

TypeError: input() takes no keyword arguments

Link to the code:

https://www.chegg.com/homework-help/questions-and-answers/816-warm-people-s-weights-lists-python-3-1-prompt-user-enter-four-numbers-comesponding-per-q17096331#